Echinoidea name details
original description (unavailable nomenclaturally)
Vaziri, M. R. & Arab, A. L. 2013. Echinoids of the Genus Tetragramma Agassiz (Phymosomatoida) from the Aptian Sediments of the Basab Region, Northwest of Kerman, Iran. Journal of Sciences, Islamic Republic of Iran 24, 149-155. page(s): 151; fig. 3A-G, 7a-c [details] Available for editors
From editor or global species database
Distribution Basab area, north-west of Kerman City, Iran [details]
Etymology Refers to its type region (Basab area). [details]
Original description Test highly inflated, weakly subpentagonal in outline and ranges in size from 38.5 to 39.3 mm in diameter and 15.1 to 16.2 mm in height. Upper surface flat, margin rounded, lower surface nearly flat. Primary tubercles are perforate and crenulate, two vertical rows in each ambulacrum. Ambulacra are straight and relatively narrow. They are 40% of the width of interambulacra. Interambulacra are broad, being 13% of the test diameter. There are three large equal primary tubercles on each ambital plate of the interambulacra, but only one on the last adapical small plates. The pore pairs are uniserial at ambitus and adorally, becoming biserial adapically. The ambitus lies at mid-height. The peristome is relatively large, circular in outline and very slightly sunken. [details]
Type material no type designated; 2 specimens mentioned, figured one is KUIC 1420 [details]
From editor or global species database
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